The Collaborative International Dictionary of English v.0.48:

Pinite \Pi"nite\, n. [L. pinus the pine tree.]
   1. (Paleon.) Any fossil wood which exhibits traces of having
      belonged to the Pine family.
      [1913 Webster]

   2. (Chem.) A sweet white crystalline substance extracted from
      the gum of a species of pine (Pinus Lambertina). It is
      isomeric with, and resembles, quercite.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Pinite \Pin"ite\, n. [So called from Pini, a mine in Saxony.]
   (Min.)
   A compact granular cryptocrystalline mineral of a dull
   grayish or greenish white color. It is a hydrous alkaline
   silicate, and is derived from the alteration of other
   minerals, as iolite.
   [1913 Webster]

WordNet (r) 3.0 (2006):

pinite
    n 1: grey or green or brown mineral similar to mica and
         containing aluminum and potassium sulphates